Colorado gunman killed six at party ‘as he was not invited’

Colorado officials say the gunman who killed six people at a birthday party at the weekend was upset that he had not been invited.

Police say Teodoro Macias, 28, fatally shot his girlfriend, Sandra Ibarra-Perez, 28, and five relatives before turning the gun on himself.

The attack unfolded at the Canterbury Mobile Home Park in Colorado Springs early on Sunday.

The party was for three relatives, two of whom died.

The attack came less than two months after a mass shooting that left 11 dead at a grocery store in the north-central Colorado city of Boulder. 

Police say the Colorado Springs gunman had a "conflict" with the targeted family at a separate event about a week earlier, and was a jealous boyfriend.